# gml:TopoPrimitiveMemberType

## Complex type information

Namespace: http://www.opengis.net/gml/3.2

Schema document: external/ogc/gml/3.2.1/topology.xsd

## Content

- Choice [1..1]
- gml:Node [0..1] gml:Node represents the 0-dimensional primitive. The optional coboundary of a node (gml:directedEdge) is a sequence of directed edges which are incident on this node. Edges emanating from this node appear in the node coboundary with a negative orientation. If provided, the aggregationType attribute shall have the value "sequence". A node may optionally be realised by a 0-dimensional geometric primitive (gml:pointProperty).
- gml:Edge [0..1] gml:Edge represents the 1-dimensional primitive. The topological boundary of an Edge (gml:directedNode) consists of a negatively directed start Node and a positively directed end Node. The optional coboundary of an edge (gml:directedFace) is a circular sequence of directed faces which are incident on this edge in document order. In the 2D case, the orientation of the face on the left of the edge is "+"; the orientation of the face on the right on its right is "-". If provided, the aggregationType attribute shall have the value "sequence". An edge may optionally be realised by a 1-dimensional geometric primitive (gml:curveProperty).
- gml:Face [0..1] gml:Face represents the 2-dimensional topology primitive. The topological boundary of a face (gml:directedEdge) consists of a sequence of directed edges. If provided, the aggregationType attribute shall have the value "sequence". The optional coboundary of a face (gml:directedTopoSolid) is a pair of directed solids which are bounded by this face. A positively directed solid corresponds to a solid which lies in the direction of the negatively directed normal to the face in any geometric realisation. A face may optionally be realised by a 2-dimensional geometric primitive (gml:surfaceProperty).
- gml:TopoSolid [0..1] gml:TopoSolid represents the 3-dimensional topology primitive. The topological boundary of a solid (gml:directedFace) consists of a set of directed faces. A solid may optionally be realised by a 3-dimensional geometric primitive (gml:solidProperty).

from subst. group gml:AbstractTopoPrimitive

## Attributes

Name | Occ | Type | Description | Notes |
---|---|---|---|---|

xlink:type | [0..1] | xsd:string | Fixed value is "simple". from group xlink:simpleLink | |

xlink:href | [0..1] | xsd:anyURI | from group xlink:simpleLink | |

xlink:role | [0..1] | xsd:anyURI | from group xlink:simpleLink | |

xlink:arcrole | [0..1] | xsd:anyURI | from group xlink:simpleLink | |

xlink:title | [0..1] | xsd:string | from group xlink:simpleLink | |

xlink:show | [0..1] | Anonymous | from group xlink:simpleLink | |

xlink:actuate | [0..1] | Anonymous | from group xlink:simpleLink | |

nilReason | [0..1] | gml:NilReasonType | from group gml:AssociationAttributeGroup | |

gml:remoteSchema | [0..1] | xsd:anyURI | from group gml:AssociationAttributeGroup | |

owns | [0..1] | xsd:boolean | Default value is "false". from group gml:OwnershipAttributeGroup |

## Used by

- Element gml:topoPrimitiveMember